I lost my keys to my 2006 Chevy Uplander and I need a price for a new one and a place to get it from

Question edited for clarity.
Question moved to model category.

Try here

https://www.google.com/search?q=2006+Chevy+Uplander.+wiring+diagram+ignition+and+starter

..

The horn going off is your anti-theft system. When you disconnected the battery, it lost its memory. Number one tip when changing batteries, maintain the power to the car with a charger, or wires to the old battery.

Reset procedure in the link

https://www.justanswer.com/chevy/7rht5-chevrolet-uplander-ls-2007-chevy-uplander-wont-crank-due.html

https://www.google.com/search?q=2007+chevy+uplander+security+reset

..

If you go to Autozone or Sears, they will do that for you, free,at Autozone, and free at Sears, if you buy the battery there.
Hope this helps.

It is possible that the key that he cut is a fraction out of align with the tumbler pins and that is registered as a wrong key combination. Have him check length of the key from the last tumbler to the pin . or take the key to a locksmith and see it anything can be explained as to why it will not turn

how do I remove my dvd player in my 2006 chevy uplander? I need to replace it and dont want to spend that kind of money to have it pulled out. I dont see any screws or bolts

open tailgate, remove 2 screws holding assembly in place. Pull tail lamp rearward to disengage 2 retainers on backside of assembly. Unplug connector. Replace assembly or bulbs now as desired